Diocletian's Palace: Private Guided Tour + Underground Cellars
Step inside one of the world's most remarkable Roman monuments — a 4th-century imperial palace that is still a living city. A private expert guide unlocks the labyrinthine underground cellars, the Peristyle courtyard, the Cathedral of Saint Domnius (built inside Diocletian's mausoleum), and the Golden Gate — layers of 1,700 years of history stacked on top of each other. This is the single most unmissable thing in Split: a UNESCO World Heritage Site where the Roman Empire never really left.